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| 1 | Collapse simulation of a super high-rise building subjected to extremely strong earthquakes显示文摘In recent years, super high-rise buildings (>500 m) are developing very quickly and become an important frontier of civil engineering. The collapse resistance of super high-rise buildings subjected to extremely strong earthquake is a critical problem that must be intensively studied. This paper builds up a nonlinear finite element model of the tallest building in China, Shang- hai Tower (632 m), and proposes the modeling method and failure criteria for different structural elements. The dynamic char- acters of this building are then analyzed, and the possible failure modes and collapse processes due to earthquakes are pre- dicted, as well as the corresponding collapse mechanism. This work will be helpful in collapse prevention and the seismic design of super high-rise buildings. | LU Xiao LU XinZheng ZHANG WanKai YE LiePing | 2011 | Science China(Technological Sciences)2011，54，10： | 49 |
| 2 | Wireless Communications with Programmable Metasurface:Transceiver Design and Experimental Results显示文摘Metasurfaces have drawn significant attentions due to their superior capability in tailoring electromagnetic waves with a wide frequency range, from microwave to visible light. Recently, programmable metasurfaces have demonstrated the ability of manipulating the amplitude or phase of electromagnetic waves in a programmable manner in real time, which renders them especially appealing in the applications of wireless communications. In this paper, we present the fundamental principle of applying programmable metasurface as transmitter for wireless communications. Then, we establish a prototype system of metasurface-based transmitter to conduct several experiments and measurements over the air, which practically demonstrate the feasibility of using programmable metasurfaces in future communication systems. By exploiting the dynamically controllable property of programmable metasurface, the design, implementation and experimental evaluation of the proposed metasurface-based wireless communication system are presented with the prototype, which realizes single carrier quadrature phase shift keying(QPSK) transmission over the air. In the developed prototype, the phase of the reflected electromagnetic wave of programma-ble metasurface is directly manipulated in real time according to the baseband control signal, which achieves 2.048 Mbps data transfer rate with video streaming transmission over the air. In addition, experimental result is provided to compare the performance of the proposed metasurface-based architecture against the conventional one. With the slight increase of the transmit power by 5 dB, the same bit error rate(BER) performance can be achieved as the conventional system in the absence of channel coding. Such a result is encouraging considering that the metasurface-based system has the advantages of low hardware cost and simple structure, thus leading to a promising new architecture for wireless communications. | Wankai Tang Xiang Li Jun Yan Dai Shi Jin Yong Zeng Qiang Cheng Tie Jun Cui | 2019 | China Communications2019，16，5： | 23 |
| 3 | Accurate and broadband manipulations of harmonic amplitudes and phases to reach 256 QAM millimeter-wave wireless communications by time-domain digital coding metasurface显示文摘We propose a theoretical mechanism and new coding strategy to realize extremely accurate manipulations of nonlinear electromagnetic harmonics in ultrawide frequency band based on a time-domain digital coding metasurface(TDCM).Using the proposed mechanism and coding strategy,we design and fabricate a millimeter-wave(mmWave) TDCM,which is composed of reprogrammable meta-atoms embedded with positive-intrinsic-negative diodes.By controlling the duty ratios and time delays of the digital coding sequences loaded on a TDCM,experimental results show that both amplitudes and phases of different harmonics can be engineered at will simultaneously and precisely in broad frequency band from 22 to33 GHz,even when the coding states are imperfect,which is in good agreement with theoretical calculations.Based on the fabricated high-performance TDCM,we further propose and experimentally realize a large-capacity mmWave wireless communication system,where 256 quadrature amplitude modulation,along with other schemes,is demonstrated.The new wireless communication system has a much simpler architecture than the currently used mmWave wireless systems,and hence can significantly reduce the hardware cost.We believe that the proposed method and system architecture can find vast application in future mmWave and terahertz-wave wireless communication and radar systems. | Ming Zheng Chen Wankai Tang Jun Yan Dai Jun Chen Ke Lei Zhang Cheng Zhang Jin Yang Lianlin Li Qiang Cheng Shi Jin Tie Jun Cui | 2022 | National Science Review2022，9，1： | 13 |
| 4 | DIRECT DIGITAL DESIGN AND SIMULATION OF MESHING IN WORM-GEAR DRIVE显示文摘蠕虫齿轮开车的一个直接数字的设计方法(DDDM ) 被建议。它是直接基于生产的模拟处理并且与常规建模方法完全不同。装载牙齿接触分析(LTCA ) 方法被分析,在哪个出现寻找技术的先进表面被包括。接触地区和传动错误(TE ) 上的 misalignmenterrors 和接触变丑的影响被讨论。蠕虫牙齿表面的 Combinedmodification 途径被介绍。借助于 DDDM 和 LTCA,验证蠕虫齿轮开车的效果是很方便的“ s 修正途径。分析结果显示出那,在侧面方向的修正在纵的方向减少减少蠕虫齿轮开车 tomisalignment 错误和修正的敏感 TE。因此,蠕虫齿轮开车的优化设计能在实际生产过程以前被完成。 | XU Wujiao QIN Datong SHI Wankai | 2006 | Chinese Journal of Mechanical Engineering2006，19，3： | 10 |
| 5 | Recent progress in advanced core-shell metal-based catalysts for electrochemical carbon dioxide reduction显示文摘Electrochemical carbon dioxide reduction(CO_(2)RR)plays an important role in solving the problem of high concentration of CO_(2)in the atmosphere and realizing carbon cycle.Core-shell structure has many unique features including tandem catalysis,lattice strain effect,defect engineering,which exhibit great potential in electrocatalysis.In this review,we focus on the advanced core-shell metal-based catalysts(CMCs)for electrochemical CO_(2)RR.The recent progress of CMCs in electrocatalytic CO_(2)RR is described as the follow-ing aspects:(1)The mechanism of electrochemical CO_(2)RR and evaluation parameters of electrocatalyst performance,(2)preparation methods of core-shell metal catalysts and core-shell structural advantages and(3)advanced CMCs towards electrochemical CO_(2)RR.Finally,we make a brief conclusion and propose the opportunities and challenges in the field of electrochemical CO_(2)RR. | Fengqi Wang Wenlong Zhang Hongbin Wan Chenxi Li Wankai An Xia Sheng Xiaoyu Liang Xiaopeng Wang Yunlai Ren Xin Zheng Dongcan Lv Yuchen Qin | 2022 | Chinese Chemical Letters2022，33，5： | 2 |
| 6 | Space-frequency-polarization-division multiplexed wireless communication system using anisotropic space-time-coding digital metasurface显示文摘In the past few years,wireless communications based on digital coding metasurfaces have gained research interest owing to their simplified architectures and low cost.However,in most of the metasurface-based wireless systems,a single-polarization scenario is used,limiting the channel capacities.To solve the problem,multiplexing methods have been adopted,but the system complexity is inevitably increased.Here,a space-frequency-polarization-division multiplexed wireless communication system is proposed using an anisotropic space-time-coding digital metasurface.By separately designing time-varying control voltage sequences for differently oriented varactor diodes integrated on the metasurface,we achieve frequency-polarization-division multiplexed modulations.By further introducing different time-delay gradients to the control voltage sequences in two polarization directions,we successfully obtain space-frequency-polarization-division multiplexed modulations to realize a wireless communication system with a new architecture.The new communication system is designed with compact dual-polarized meta-elements,and can improve channel capacity and space utilization.Experimental results demonstrate the high-performance and real-time transmission capability of the proposed communication system,confirming its potential application in multiple-user collaborative wireless communications. | Jun Chen Ke Xiangyu Chen Wankai Tang Ming Zheng Chen Lei Zhang Li Wang Jun Yan Dai Jin Yang Jun Wei Zhang Lijie Wu Qiang Cheng Shi Jin Tie Jun Cui | 2022 | National Science Review2022，9，11： | 2 |
| 7 | A Markov Chain Monte Carlo Approach to Estimate the Risks of Extremely Large Insurance claims 显示文摘 | wankai Pang | 2007 | International Journal of Business and Economics2007，，3： | 1 |
| 8 | Analysis of power flow in a counter-rotating epicyclic gearing for electrical propulsion system 显示文摘 | Shi Wankai Li Liangjun Qin Datong | 2011 | Journal of Mechanical Engineering Science2011，225，12： | 1 |
| 9 | A solid modeling and geometric analysis of hourglass worm gearing显示文摘 | Qin Dongxing Qin Datong Shi Wankai | 1998 | Journal of Chongqing University1998，21，4： | 1 |
| 10 | Exponential stability of numerical solutions for a class of stochastic age-dependent capital system with Poisson jumps 显示文摘 | Zhang Qimi Pang Wankai Leung Pingkei | 2011 | Journal of Computational and Applied Mathematics2011，235，12： | 1 |
| 11 | Exponential stability of numerical solutions for a class of stochastic age-dependent capital system with Poisson jumps显示文摘 | Zhang Qimin Pang Wankai Leung Pingkei | 2011 | Journal of Computational and Applied Mathematics2011，235，12： | 1 |
| 12 | Analysis of the spatial and temporal expression pattern directed by the Populus tomentosa 4-coumarate:CoA ligase Pto4CL2 promoter in transgenic tobacco显示文摘 | Xiang Pan Huanhuan Li Hongyi Wei Wankai Su Xiangning Jiang Hai Lu | 2013 | Molecular Biology Reports2013，，3： | 1 |
| 13 | Convergence of the semi-implicit Euler method for stochastic agedependent population equations显示文摘 | Pang Wankai Li Ronghua Liu Min | 2008 | Applied Mathematics and Computation2008，195，： | 1 |
| 14 | Exponential stability of numerical solutions to stochastic age-dependent population equations显示文摘 | Pang Wankai Li Ronghua Liu Ming | 2006 | Applied Mathematics and Computation2006，183，： | 1 |
| 15 | Meshing Control of the Double-enveloping HhourglassWorm Gearing under the Conditions of Existing the Errors and theLoad显示文摘 | Wankai Shi | 2004 | Mechanism and Machine Theory2004，，39： | 1 |
| 16 | Convergence of numerical solutions to stochastic agedependent population equations with Markovian switching显示文摘 | LI RONGHUA LEUNG Ping-Kei PANG Wankai | 2009 | Journal of Computational and Applied Mathematics2009，233，4： | 1 |
| 17 | Exponential stability of numerical solutions to stochastic age-dependent population equations显示文摘 | PANG Wankai LI Ronghua LIU Ming | 2006 | Applied Mathematics and Computation2006，183，： | 1 |
| 18 | Convergence of numericalsolutions to stochastic age-dependent population equations with Mark-ovianian switching显示文摘 | Li Ronghua Leung Pingkei Pang Wankai | 2009 | Journal of Computational and Applied Mathe-matics2009，，233： | 1 |
| 19 | Convergence of the semi-implicit Euler method for stochastic age- dependent population equations 显示文摘 | PANG Wankai LI Ronghua LIU Min | 2008 | Applied Mathematics and Computation2008，195，： | 1 |
| 20 | Exponential stability of numerical solutions to stochastic age- dependent population equations 显示文摘 | PANG Wankai LI Ronghua LIU Min | 2006 | Applied Mathe- matics and Computation2006，186，： | 1 |
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